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DbEntityValidationException - How can I easily tell what caused the error?
...eption message with the new one.
var exceptionMessage = string.Concat(ex.Message, " The validation errors are: ", fullErrorMessage);
// Throw a new DbEntityValidationException with the improved exception message.
throw new DbEntityValidationException(excep...
Merge and interleave two arrays in Ruby
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[ "a", "b" ].concat( ["c", "d"] ) #=> [ "a", "b", "c", "d" ]
– Leo Romanovsky
Oct 4 '12 at 4:41
31
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How can I get the concatenation of two lists in Python without modifying either one? [duplicate]
In Python, the only way I can find to concatenate two lists is list.extend , which modifies the first list. Is there any concatenation function that returns its result without modifying its arguments?
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Difference between null and empty (“”) Java String
... @Zach L : when String s = null+"a"; it gives output nulla but null.concat("a") it gives the null pointer exception. what is the reason in my first case null+"a"; is working.
– Ved Prakash
Sep 14 '19 at 16:23
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Changing the default folder in Emacs
...s works on MacOS too. I added this to my .emacs: (setq default-directory (concat (getenv "HOME") "/"))
– vy32
Dec 21 '13 at 15:46
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T-SQL CASE Clause: How to specify WHEN NULL
... firts+space+last name.
this will work as long as the default setting for concatenation with null strings is set:
SET CONCAT_NULL_YIELDS_NULL ON
this shouldn't be a concern since the OFF mode is going away in future versions of SQl Server
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Any equivalent to .= for adding to beginning of string in PHP?
...n assignment operator and no one commented on its usage for general string concatenation.
You may want to look into the use of the sprintf (documentation) family of functions for string concatenation.
It provides a lot more sanitization and usability than just combining two strings with assignment ...
javascript function leading bang ! syntax
...= 2 statement isn't terminated due to the following parenthesis.
Also in concatenated javascript files you don't have to worry if the preceding code has missing semicolons. So no need for the common ;(function(){})(); to make sure your own won't break.
I know my answer is kind of late but i think...
JavaScript style for optional callbacks
...tions
( rest
, combs =>
callback (combs .concat (combs .map (c => [ x, ...c ])))
)
console.log (combinations (['A', 'B', 'C']))
// [ []
// , [ 'C' ]
// , [ 'B' ]
// , [ 'B', 'C' ]
// , [ 'A' ]
// , [ 'A', 'C' ]
// , [ 'A', 'B' ]
// , [ 'A', 'B...
import .css file into .less file
...
Perfect. This works well when you want to concat some CSS files (e.g. in an ie7.less), but not necessarily process them (e.g. bootstrap-ie7 uses expressions, which LESS doesn't handle well).
– Joe
Jun 26 '14 at 18:56
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